"I am here to reinforce efforts by UNHCR and the Greek government to step up the emergency response to the deteriorating humanitarian situation," Jolie said in a press release on Wednesday. "I look forward to meeting authorities, partners and volunteers working on the ground to improve conditions and ensure the vulnerable are protected."

This trip follows Jolie's visit to a Syrian refugee camp in Lebanon on Tuesday, where she raised awareness on the five-year anniversary of the Syrian civil war.

"There are 4.8 million Syrian refugees in this region, and 6.5 million people displaced inside Syria," Jolie said during a speech on Tuesday. "On this day, the fifth anniversary of the Syria conflict, that is where I had hoped I would be: in Syria, helping UNHCR with returns, and watching families I have come to know be able to go home. It is tragic and shameful that we seem to be so far from that point."